CN109931330A - Thrust bearing and bearing arrangement - Google Patents
Thrust bearing and bearing arrangement Download PDFInfo
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- CN109931330A CN109931330A CN201811543521.6A CN201811543521A CN109931330A CN 109931330 A CN109931330 A CN 109931330A CN 201811543521 A CN201811543521 A CN 201811543521A CN 109931330 A CN109931330 A CN 109931330A
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- bearing
- tapering
- thrust bearing
- bag portion
- planar portions
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/047—Sliding-contact bearings for exclusively rotary movement for axial load only with fixed wedges to generate hydrodynamic pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/166—Sliding contact bearing
- F01D25/168—Sliding contact bearing for axial load mainly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
- F16C33/1065—Grooves on a bearing surface for distributing or collecting the liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
- F16C33/1075—Wedges, e.g. ramps or lobes, for generating pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/02—Crankshaft bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/30—Angles, e.g. inclinations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/42—Groove sizes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sliding-Contact Bearings (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Thrust bearing and bearing arrangement are provided, the thrust bearing and bearing arrangement reduce sliding friction and lose and improve foreign matter discharge property.In the sliding surface of thrust bearing, planar portions, tapering and bag portion are sequentially formed with along defined glide direction.Tapering by with from the end of planar portions towards glide direction and wall thickness gradually the thinning conical surface is constituted.Bag portion is configured to include: the bottom surface for being configured to the thinner wall thickness in most thin portion in wall ratio tapering；The first side of tapering side；And the second side of the side opposite with first side.Tapering is configured to, and the depth away from most thin portion is between 10 μm~80 μm.Bag portion is configured to, and the first angle between imaginary plane and second side that bottom surface extends is between 90 °~120 °, the second angle between the imaginary plane for extending first side and the conical surface is between 60 °~120 °.
Description
Technical field
The present invention relates to the constructions of the thrust bearing of the power on the axis direction for the crankshaft for bearing internal combustion engine and bearing arrangement.
Background technique
Back and forth, it is known to bear the thrust bearing of the power on the axis direction of the crankshaft of internal combustion engine.Such as in patent
In document 1, proposes a kind of face in a side and have the sliding surface supported in the axial direction to crankshaft and be formed as court
To the split thrust bearing of split (Japanese: the partly cutting) annulus shape of the direction of rotation of crankshaft and the thinning inverted wedge face of wall thickness.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2014-202295 bulletin
Summary of the invention
Problems to be solved by the invention
As above-mentioned inverted wedge face, be configured to towards crankshaft glide direction and the conical surface that bearing clearance broadens, because
Generated negative pressure and lubricating oil is attracted.In the sliding surface for producing negative pressure, the air being dissolved in lubricating oil can be generated and become
It is bubble the phenomenon that being referred to as air pocket.When generating air pocket, the sliding for the realization that can obtain becoming smaller because of the shearing resistance of fluid
The reducing effect of friction loss.
However, there are foreign matters to be attracted together with lubricating oil to sliding surface about the thrust bearing for having such conical surface
The problem of.In above-mentioned previous thrust bearing, the foreign matter of lubricating oil will be mixed into bearing using the gap formed from inverted wedge face
Outside discharge.However, due to generating negative pressure in such inverted wedge face, foreign matter is not according to the opinion of present inventor
Centainly it is smoothly discharged.In this way, have generate negative pressure the conical surface thrust bearing in, it is expected that reduce sliding friction loss and
It is effectively discharged out the foreign matter being attracted together with lubricating oil.
The present invention is made to solve project as described above, and its purpose is to provide reduce sliding friction loss
And improve the thrust bearing and bearing arrangement of foreign matter discharge property.
Technical teaching for solving the problem was
In order to achieve the above objectives, the 1st invention is applied to pushing away for the sliding surface with annulus shape or split annulus shape
Power bearing.In the sliding surface of thrust bearing, planar portions, tapering and bag portion are sequentially formed with along defined glide direction.It is flat
Face is made of the plane of constant wall thickness.Tapering by with from the end of planar portions towards glide direction and wall thickness is gradually thinning
The conical surface constitute.It includes: the thinner bottom surface in most thin portion for being configured to wall ratio tapering that bag portion, which is configured to, constituted in tapering side the
One side and the second side constituted in the side opposite with first side.Tapering is configured to, from the planes of planar portions to most
The depth in thin portion is between 10 μm~80 μm.Also, bag portion is configured to, the imaginary plane that bottom surface is extended and second side it
Between angle, that is, first angle be between 90 °~120 °, the angle between the imaginary plane for extending first side and the conical surface
I.e. second angle is between 60 °~120 °.
2nd invention also has feature below on the basis of 1 invention.
In sliding surface, it has been formed continuously by the tectosome that planar portions, tapering and bag portion are constituted multiple.
3rd invention also has feature below on the basis of the 1st invention or 2 invention.
Bag portion is configured to, and the depth of the bottom surface from the plane of planar portions to bag portion is 0.1mm or more.
On the basis of any invention of 4th invention in the 1st invention~the 3rd invention, also there is feature below.
The axis for the flange-type that thrust bearing is integrally formed as the sliding bearing with the power radially for bearing object axis
It holds and constitutes.
5th invention is applied to the bearing arrangement of the crankshaft supported to the crankshaft of internal combustion engine.Bearing arrangement has bearing
Thrust bearing described in any invention in supporting part and the 1st invention~the 4th invention.Bearing support has bearing hole and formation
Bearing block around bearing hole, and be configured to support the axle journal of crankshaft by bearing hole.Thrust bearing is with the rotation of crankshaft
Direction and the consistent direction of defined glide direction are configured at bearing block.
The effect of invention
According to the 1st invention, planar portions generate extrusion effect (Japanese: ス Network イ ズ effect), and tapering generates air pocket, and
The capture effect of bag portion generation foreign matter.It is captured by the foreign matter attracted to tapering by bag portion due to negative pressure.Second side generates fluid
Turning loss (Japanese: bent Ga り loss), thus play trapping foreign matter in the function of bag portion.The first angle of bag portion is bigger
Then the turning loss is bigger.In the 1st invention, by the way that first angle to be set as between 90 °~120 °, so as to inhibit bedding bag
The foreign matter of portion's capture is flowed to planar portions.In addition, first side play by bag portion generate negative pressure and attract foreign matter function,
With the function for the return for preventing foreign matter and generating sinuous flow in the inside of bag portion.The second angle the big then to bear what bag portion generated
Press it is smaller, second angle more it is big then bag portion generate sinuous flow it is bigger.In the 1st invention, by by second angle be set as 60 °~
Between 120 °, so as to realize taking into account function that foreign matter attracts to bag portion and the function for the return for preventing foreign matter.
According to the 2nd invention, it can be taken into account well in sliding surface and play extrusion effect, the generation of air pocket and catching for foreign matter
Obtain effect.
0.1mm or so is up to by the size of the foreign matter attracted to the conical surface.It therefore, can be will be maximum according to the 3rd invention
The trapping foreign matter of size prevents biting for foreign matter in the case where bag portion.
According to the 4th invention, thrust bearing is constituted as the flanged bearing being integrally formed with sliding bearing.Therefore, root
According to the present invention, number of components can be cut down.
According to the 5th invention, thrust bearing is configured with the direction of rotation of crankshaft and the consistent direction of defined glide direction.Cause
This, bearing arrangement according to the present invention can reduce the sliding friction with crankshaft and lose and improve foreign matter discharge property.
Detailed description of the invention
Fig. 1 is the composition for showing the engine main body of the internal combustion engine of bearing arrangement for the crankshaft for applying embodiment 1
Figure.
Fig. 2 is the figure for being exaggerated the bearing portion A of the crankshaft in Fig. 1.
Fig. 3 is along the bearing portion in line B-B cut away view 2 and the schematic diagram observed from the axis direction of crankshaft.
Fig. 4 is the figure for illustrating the composition of thrust bearing.
Fig. 5 is the figure for schematically showing cross sectional shape when carrying out cutting to bearing along the curve C-C in Fig. 4.
Fig. 6 is the figure for showing the distribution of the oil film pressure in the planar portions of thrust bearing and tapering generation.
Fig. 7 is an example for showing extrusion effect index and air pocket generation index relative to the verification result of air pocket area depth
Figure.
Fig. 8 is the figure for the shape for illustrating the bag portion of thrust bearing.
Fig. 9 is the figure for the shape for illustrating second side face of bag portion.
Figure 10 is to show figure that flow into the lubricating oil of bag portion, that turning loss index is relative to the variation of first angle θ 1.
Figure 11 is the figure for the shape for illustrating the first side of bag portion.
Figure 12 is to show air pocket to generate an example of index and sinuous flow generation index relative to the verification result of second angle θ 2
Figure.
Figure 13 is the figure for showing the variation of composition of thrust bearing.
Figure 14 is the figure for showing the variation of construction of bearing arrangement.
Description of symbols
1 engine main body
2 crankshafts
3,4 thrust bearing
7 flanged bearings
14 saddles
16 covers
18 bearing holes
21 axle journals
22 sliding surfaces
31,41 sliding surface
42 planar portions
44 taperings
46 bag portions
121,122 sliding bearing
141,142 bearing block
461 first sides
462 bottom surfaces
463 second sides
Specific embodiment
Hereinafter, the embodiments of the present invention will be described with reference to the drawings.But it is mentioned in embodiment as shown below
It is bright the case where in addition to especially having expressed and/or in principle and in the case where the number of number, quantity, amount, range of each element etc.
Really specific to except the situation of the number, the present invention is not limited to the numbers being referred to.In addition, in embodiment party as shown below
The construction illustrated in formula, in addition to the case where especially having expressed and/or in principle clearly specific to above-mentioned construction the case where other than,
It is not necessarily for the present invention necessary.
Embodiment 1.
Hereinafter, being illustrated referring to attached drawing to embodiments of the present invention 1.
1. the composition of embodiment 1
Fig. 1 is the engine main body for showing the internal combustion engine (engine) of the bearing arrangement for the crankshaft for applying embodiment 1
Composition figure.Fig. 1 is schematically shown will be obtained by engine main body cutting with the vertical face of the central axis by crankshaft
Section.The engine of present embodiment is spark ignition engine.Engine is equipped on vehicle as power source.This starts
The engine main body 1 of machine has multiple cylinders.The example for being configured with four cylinders in-linely, but number of cylinders is shown in FIG. 1
Arrangement with cylinder does not limit.
In engine main body 1, it is built-in with the crankshaft 2 of the object axis as bearing object.Link in the one end of crankshaft 2
There is speed changer (not shown).Speed changer can be the automatic transmission (AT) and/or continuous variable speed change for having fluid torque-converter
Device (CVT), is in addition also possible to the speed changer for having clutch.In addition, in the following description, it, will in engine main body 1
The side for being provided with speed changer is known as that the side for being not provided with speed changer being known as " on front side of engine " " on rear side of engine ".
Fig. 2 is the figure for being exaggerated the bearing portion A of the crankshaft in Fig. 1.In addition, Fig. 3 is along line B-B to the axis in Fig. 2
The schematic diagram that bearing portion carries out cutting and observes from the axis direction of crankshaft.Hereinafter, referring to Fig. 2 and Fig. 3, in more detail to crankshaft
2 bearing arrangement is illustrated.As shown in Fig. 2, crankshaft 2 is supported by the sliding bearing 121,122 for being configured at bearing hole 18 as rotation
Turn freely, the bearing hole 18 penetrates through the two sides of bearing support.Sliding bearing 121,122 is the radial direction for bearing crankshaft
On power bearing, and be configured to include cylindrical shape component axis plane by the cylindrical shape be divided into two it is split
A pair of bearings of type (Japanese: partly cutting type).Sliding bearing 121,122 is respectively arranged at saddle 14 and lid as bearing support
Portion 16.Saddle 14 is the structure constituted on the engine cylinder side of engine main body 1, in addition, cover 16 is as engine
Component except the engine cylinder body of main body 1 and the structure constituted.By the way that cover 16 is fixed on saddle 14, match to be formed
Set the bearing hole 18 of sliding bearing 121,122.
It is in two sides of the saddle 14 between the 2nd cylinder and the 3rd cylinder, towards (becoming on rear side of engine
Fast device side) side be provided with bearing block 141.In addition, in two sides of saddle 14, towards on front side of engine (i.e. with
The opposite side of speed changer) side be provided with bearing block 142.Bearing block 141,142 is for carrying out determining for thrust bearing 3,4
The recess portion of position, is set to the periphery of bearing hole 18.Thrust bearing 3,4 is as to include the annulus shape with a thickness of 2mm or so
The plane of the axis of component by the component of the annulus shape be divided into two split annulus shape bearing and constitute.Thrust bearing 3,
4 with the mode opposite with the sliding surface 22 of crankshaft 2 of sliding surface 31,41 of split annulus shape be respectively arranged at bearing block 141,
On 142.Sliding surface 22 is the plane for being set to the annulus shape at both ends of axle journal 21.In the sliding surface 22 and thrust axis of crankshaft 2
It holds between 3,4 sliding surface 31,41, is formed with bearing clearance because of the oil film of lubricating oil.When crankshaft 2 rotates, sliding surface 22
It is slided via oil film relative to sliding surface 31,41.According to such composition, thrust bearing 3,4 is born by sliding surface 31,41
The thrust load on axis direction that crankshaft 2 generates.
2. the composition of thrust bearing
Then, the composition of the thrust bearing of the feature of the bearing arrangement as embodiment 1 is illustrated.In addition, pushing away
The sliding surface 31 of power bearing 3 and the sliding surface 41 of thrust bearing 4 have the shape of mirror symmetry.Therefore, in the following description,
The specific shape of thrust bearing is illustrated by taking thrust bearing 4 as an example.Fig. 4 is the composition for illustrating thrust bearing
Figure.In addition, Fig. 5 is to schematically show the cross sectional shape carried out along the curve C-C in Fig. 4 to bearing in the case where cutting
Figure.In addition, these glide directions shown in the drawings indicate direction of rotation of the sliding surface 22 of crankshaft 2 relative to sliding surface 41.Such as
Shown in these figures, planar portions 42, tapering 44 and bag portion 46 are formed in the sliding surface 41 of the thrust bearing 4 of embodiment 1.
Planar portions 42 are made of thickness, that is, constant wall thickness plane of bearing.Positive pressure is generated in the bearing clearance of planar portions 42
Oil film pressure.Planar portions 42 are played by the extrusion effect of the oil film of the positive pressure inhibit the deformation because of crankshaft 2 caused by it is sliding
The function of the offset in dynamic face 22.In addition, in the following description, by it is in the sliding surface 41 of thrust bearing 4, be formed with planar portions
42 region is known as " extrusion effect region ".
Tapering 44 by with the glide direction with the sliding surface 22 from the end of planar portions 42 towards crankshaft 2 and wall thickness is thinning
The inclined plane of mode the conical surface constitute.In the bearing clearance in tapering 44, the oil film of negative pressure is generated because lubricating oil is attracted
Pressure.
Here, generating air pocket in the sliding surface for producing negative pressure.It is η=1mPas with lubricating oil about the viscosities il of fluid
~100mPas or so is compared, and air is much smaller than lubricating oil viscosity for η=0.01mPas~0.1mPas or so.Such as following formula
(1) shown in, the shearing resistance τ and viscosities il and sliding speed U of fluid are in direct ratio, inversely proportional with the film thickness h of oil film.Therefore,
When the oil film of bearing clearance generates air pocket, the shearing resistance τ of oil film becomes smaller, and thus sliding friction reduces.In the following description
In, region in the sliding surface 41 of thrust bearing 4, being formed with tapering 44 is known as " air pocket area ".In addition, will be by tapering 44
The thickest portion and most thin portion wall thickness difference indicate tapering 44 depth H c be known as " air pocket area depth ".
Moreover, bag portion 46 is configured to include: the thinner bottom surface 462 in most thin portion for being configured to wall ratio tapering 44；In tapering
The first side 461 that 44 sides are constituted；And the second side 463 constituted in the side opposite with first side 461.Lubricating oil from
Tapering 44 is flowed into bag portion 46.Bag portion 46 plays the function for the foreign matter that capture is attracted to tapering 44 as a result,.In sliding surface 41
In, it has been continuously formed by a series of tectosome that the planar portions 42, tapering 44 and bag portion 46 are formed multiple.
3. the feature of thrust bearing
Present inventor is conceived to the movement of lubricating oil in the flowing of sliding surface 41 of thrust bearing 4 and is repeated
Conscientiously study.Finally, it is found that in order not to lose extrusion effect and obtain the effect realized by the generation of air pocket to the maximum extent
The optimum shape in the tapering 44 of fruit and in order to effectively capture the optimum shape of the bag portion 46 of the foreign matter attracted to tapering 44.
The feature in the tapering 3-1.
Firstly, being illustrated to the optimum shape in tapering 44.Fig. 6 is shown in the planar portions of thrust bearing and tapering generation
Oil film pressure distribution figure.As shown in the drawing, the planar portions 42 of thrust bearing 4 influence the generation of the extrusion effect of positive pressure.
In contrast, the generation of air pocket caused by the tapering 44 of thrust bearing 4 is influenced because of negative pressure.In thrust bearing 4, it is desirable that well
It takes into account performance thrust load of the bearing from crankshaft 2 and reduces the two effects of sliding friction.
Fig. 7 is the one of the verification result for indicating extrusion effect index and air pocket generation index relative to air pocket area depth
Example.In addition, extrusion effect index be for judge by extrusion effect realize bearing function superiority and inferiority index, such as by with
Under formula (2) calculate.In addition, it is for judging that generating the sliding friction realized by air pocket reduces the excellent of function that air pocket, which generates index,
Bad index, such as calculated by formula below (3).In addition, p indicates that oil film pressure, x indicate to slide in following formula (2), (3)
The coordinate in dynamic direction, η indicate the viscosity of oil film, and U indicates the sliding speed of crankshaft 2, and h indicates oil film thickness, and V indicates crankshaft
The closing speed of 2 axial thrust bearings 4.
Verification result according to figure 7, extrusion effect index most advantage when air pocket area depth is 0, and cavity
Domain depth more it is deep then more disadvantage.In contrast, air pocket generates index most advantage when air pocket area depth is 0, in air pocket area
Most disadvantage when depth is 80 μm, and air pocket area depth more further deepens then more disadvantage.
Like this, verification result according to figure 7, from the viewpoint of extrusion effect, preferably air pocket area depth is small,
From the viewpoint of the effect realized by the generation of air pocket, air pocket area depth is preferably 80 μm of front and backs.But in air pocket area
Depth is the range bigger than 80 μm, and extrusion effect becomes disadvantage, in addition, in range of the air pocket area depth less than 10 μm, it can not
Expect the generation of air pocket.Therefore, in the thrust bearing 4 of embodiment 1, as the production for ensuring air pocket in maximum region
Range that is raw and not losing extrusion effect, sets tapering 44 in such a way that air pocket area depth is 10 μm~80 μm of range
Shape.
The feature of 3-2. bag portion
Then the shape of bag portion 46 is illustrated.Fig. 8 is the figure for the shape for illustrating the bag portion of thrust bearing.In the presence of
The case where foreign matter is attracted together with lubricating oil to tapering 44.It is captured by the foreign matter attracted to tapering 44 in bag portion 46.Therefore,
Preferably, by bag portion 46 be set as in the case where capturing the maximum sized foreign matter of imagination foreign matter not with sliding face contact
Size.Following formula (4) shows to make the condition not contacted with the sliding surface 22 of crankshaft 2 by the foreign matter that bag portion 46 captures.
As from the bottom surface of bag portion 46 462 to bag depth H p as defined in the height of planar portions 42 for example preferably in the item for meeting following formula (4)
The range of part determines.In addition, Ra indicates the surface roughness [mm] of the sliding surface 22 of crankshaft 2 in formula (4), Rb indicates thrust
The surface roughness [mm] of the sliding surface 41 of bearing 4, ha indicate the size [mm] of foreign matter.
For example, then becoming the item that can ignore that Ra and Rb in formula (4) when it is 0.001mm that Ra, which is 0.0005mm, Rb,
The small value of degree, therefore, bag depth H p meet Hp >=ha.Therefore, when imagination foreign matter size ha is up to 0.1mm, bag
Depth H p is preferably set to 0.1mm or more.In the thrust bearing 4 of embodiment 1, it is also considered that bag portion 46 is realized as oil groove
The case where function, and bag depth H p is set as 0.8mm~1.2mm or so, the wide Wp of bag is set as 2mm~3mm or so.
The problem of shape of 3-3. bag portion
Even if ensuring the bag depth H p of bag portion 46, but it is also envisaged that because of first side 461 and second side 463
The case where shape and captured foreign matter turn again to tapering 44 or planar portions 42.Therefore, in the thrust bearing 4 of embodiment 1
In, by the inclination angle of regulation first side 461 and second side 463, to prevent the return of foreign matter.
The feature of the second side of 3-4. bag portion
Fig. 9 is the figure for the shape for illustrating second side face of bag portion.As shown in the drawing, bottom surface 462 is extended
First angle θ 1 formed by imaginary plane and second side 463 influences to flow into the turning loss index of the lubricating oil of bag portion 46.Figure 10
It is that figure that flow into the lubricating oil of bag portion, that turning loss index is relative to the variation of first angle θ 1 is shown to show as shown in the drawing
Go out that the first angle θ 1 the big, has flowed into the bigger tendency of the turning loss of the lubricating oil of bag portion 46.But as first angle θ 1
When increasing above 90 °, it can generate because second side 463 and 42 angulation of planar portions become durability caused by acute angle
And/or the worry of processability.Therefore, in the thrust bearing 4 of embodiment 1, as second for preventing the return of foreign matter
The composition of side 463, first angle θ 1 are set as 1≤120 ° of 90 °≤θ of range.In addition, if considering durability and/or processing
Property, then first angle θ 1 is more preferably 1≤100 ° of 90 °≤θ of range, in this range also particularly preferred θ 1=90 °.
The feature of the first side of 3-5. bag portion
Figure 11 is the figure for the shape for illustrating the first side of bag portion.When lubricating oil is flowed into bag portion 46, due to stream
The steering resistence of body and 461 side of the first side of the inside of bag portion 46 generate with removing sinuous flow.When in bag portion 46
When inside generates sinuous flow, the oil stream returned from the inside of bag portion 46 to tapering 44 can be interfered dynamic.The conical surface in tapering 44 is extended
Imaginary plane and first side 461 formed by second angle θ 2 influence the sinuous flow generation degree.Therefore, if to make unrest as far as possible
The mode that the generation of stream is actively changed sets second angle θ 2, then can prevent the return of foreign matter captured by bag portion 46.
Figure 12 is to show air pocket to generate an example of index and sinuous flow generation index relative to the verification result of second angle θ 2.
As shown in the drawing, the tendency that the sinuous flow in the more big then bag portion 46 of second angle θ 2 generates index more advantage is shown.Therefore, in order to
Change the generation of sinuous flow actively, second angle θ 2 is preferably set as to such as 90 ° or more of range.
However, second angle θ 2 not only influences the generation of sinuous flow, the attraction effect of foreign matter caused by also influencing because of negative pressure.Such as
Shown in Figure 12, the tendency that the more big then air pocket of second angle θ 2 generates index more disadvantage is shown.According to the verification result, Neng Goukao
Consider even if in the case where second angle θ 2 is less than 90 °, when producing negative pressure as generating air pocket, can also expect different
The attraction effect of object.Solid line shown in Figure 12 is that air pocket is generated index and generates the objective function that index is multiplied with sinuous flow.
According to the objective function, show in the case where second angle θ 2 is 60 °, from because of foreign matter caused by negative pressure attraction and sinuous flow
The obtained effect of synthesis of generation it is maximum.
Therefore, in the thrust bearing 4 of embodiment 1, as in order to promote foreign matter attraction and prevent returning for foreign matter
Second angle θ 2, is set as 2≤120 ° of 60 °≤θ of range by the composition for the first side 461 returned.In addition, if considering durability
And/or processability, then second angle θ 2 is preferably 2≤100 ° of 90 °≤θ of range, is also particularly preferably θ 2=in this range
90°。
According to the composition of bag portion 46 discussed above, can capture the foreign matter attracted by negative pressure to tapering 44 and
Prevent the foreign matter from again returning to tapering 44.Like this, crowded by taking into account according to the thrust bearing 4 and bearing arrangement of embodiment 1
The generation and trapping foreign matter effect of effect, air pocket are pressed, so as to reduce sliding friction loss and improve foreign matter discharge
Property.
[variation of the construction of bearing arrangement]
The bearing arrangement of embodiment 1 for example can also be using the composition deformed as described below.
Figure 13 is the figure for showing the variation of composition of thrust bearing.As shown in the drawing, pushing away about composition air pocket area
The tapering 44 of power bearing 4, bearing clearance can also and non-linear change.That is, tapering 44 by with towards glide direction and axis
Face as gap gradually narrows is held to constitute.For example, as shown in figure 13, it can be by curved surface structure convex upwards
At alternatively, it is also possible to be made of curved surface convex downwards.
Figure 14 is the figure for showing the variation of construction of bearing arrangement.In the example shown in the figure, thrust bearing 3,4 is made
For the flange-type integral with sliding bearing 121 flanged bearing 7 and constitute.It, can according to the construction of such bearing arrangement
Cut down number of components.
Also can replace saddle 14 and thrust bearing 3,4 be set in the two sides of cover 16, or in addition to saddle 14 with
Thrust bearing 3,4 also is set in the two sides of cover 16 outside.
Claims (5)
1. a kind of thrust bearing, which has the sliding surface of annulus shape or split annulus shape, which is characterized in that
In the sliding surface of the thrust bearing, planar portions, tapering and bag are sequentially formed with along defined glide direction
Portion,
The planar portions are made of the plane of constant wall thickness,
The tapering by with from the end of the planar portions towards the glide direction and wall thickness gradually thinning conical surface structure
At,
The bag portion is configured to
It is configured to the thinner bottom surface in the most thin portion in tapering described in wall ratio；
In the first side that the tapering side is constituted；And
In the second side that the side opposite with the first side is constituted,
The tapering is configured to, the depth from the plane of the planar portions to the most thin portion be in 10 μm~80 μm it
Between,
The bag portion is configured to,
The angle i.e. first angle between imaginary plane and the second side that the bottom surface is extended be in 90 °~120 ° it
Between, the angle i.e. second angle between the imaginary plane for extending the first side and the conical surface be in 60 °~120 ° it
Between.
2. thrust bearing according to claim 1, which is characterized in that
In the sliding surface, it has been continuously formed by the tectosome that the planar portions, the tapering and the bag portion are constituted
It is multiple.
3. thrust bearing according to claim 1 or 2,
The bag portion is configured to, the depth of the bottom surface from the plane of the planar portions to the bag portion be 0.1mm with
On.
4. thrust bearing described in any one of claim 1 to 3, which is characterized in that
The axis for the flange-type that the thrust bearing is integrally formed as the sliding bearing with the power radially for bearing object axis
It holds and constitutes.
5. a kind of bearing arrangement of crankshaft, the bearing arrangement support the crankshaft of internal combustion engine, which is characterized in that
The bearing arrangement has:
Bearing support, the bearing block which has bearing hole and be formed in around the bearing hole, passes through institute
State the axle journal that bearing hole supports the crankshaft；With
Thrust bearing according to any one of claims 1 to 4,
The thrust bearing is configured at the bearing with the direction of rotation of the crankshaft and the consistent direction of defined glide direction
Seat.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-241792 | 2017-12-18 | ||
| JP2017241792A JP2019108923A (en) | 2017-12-18 | 2017-12-18 | Thrust bearing and bearing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109931330A true CN109931330A (en) | 2019-06-25 |
Family
ID=66674815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811543521.6A Pending CN109931330A (en) | 2017-12-18 | 2018-12-17 | Thrust bearing and bearing arrangement |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US10648503B2 (en) |
| JP (1) | JP2019108923A (en) |
| CN (1) | CN109931330A (en) |
| DE (1) | DE102018127859A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4348065A (en) * | 1979-07-13 | 1982-09-07 | Hitachi, Ltd. | Thrust bearing |
| JP2008542657A (en) * | 2005-06-01 | 2008-11-27 | フェデラル−モーグル コーポレイション | Thrust bearing |
| CN103322022A (en) * | 2012-03-19 | 2013-09-25 | 大同金属工业株式会社 | Half bearing and plain bearing |
| JP2017172607A (en) * | 2016-03-18 | 2017-09-28 | 大豊工業株式会社 | Washer |
| CN107407331A (en) * | 2015-02-27 | 2017-11-28 | 大丰工业株式会社 | Sliding bearing |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9127191D0 (en) * | 1991-12-21 | 1992-02-19 | T & N Technology Ltd | Flanged bearings |
| US5829338A (en) * | 1997-03-03 | 1998-11-03 | Fmc Corporation | Pump having unidirectional tapered land thrust bearing cluster |
| US5951169A (en) * | 1997-03-27 | 1999-09-14 | Pump Engineering, Inc. | Thrust bearing |
| US6132094A (en) * | 1998-12-21 | 2000-10-17 | Fmc Corporation | Multiple groove thrust bearing |
| US6976788B2 (en) * | 2001-03-27 | 2005-12-20 | Nok Corporation | Thrust bearing |
| US6921210B2 (en) * | 2003-04-11 | 2005-07-26 | Federal-Mogul World Wide, Inc. | Flange bearing |
| DE20317497U1 (en) * | 2003-07-05 | 2004-03-11 | Man B & W Diesel Ag | Plain thrust bearing for bearings in an exhaust gas turbocharger's rotating shaft linked to a lubricating oil circuit, has a sliding surface and a bearing surface with lubricating gap |
| WO2013099600A1 (en) * | 2011-12-27 | 2013-07-04 | 三菱重工業株式会社 | Thrust bearing device for supercharger |
| GB2508915A (en) * | 2012-12-14 | 2014-06-18 | Mahle Int Gmbh | A thrust washer for a sliding bearing |
| JP2014163402A (en) * | 2013-02-21 | 2014-09-08 | Daido Metal Co Ltd | Half-split thrust bearing and bearing device |
| JP6115994B2 (en) | 2013-04-05 | 2017-04-19 | 大同メタル工業株式会社 | Bearing device |
-
2017
- 2017-12-18 JP JP2017241792A patent/JP2019108923A/en active Pending
-
2018
- 2018-11-08 DE DE102018127859.4A patent/DE102018127859A1/en not_active Withdrawn
- 2018-12-11 US US16/216,084 patent/US10648503B2/en active Active
- 2018-12-17 CN CN201811543521.6A patent/CN109931330A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4348065A (en) * | 1979-07-13 | 1982-09-07 | Hitachi, Ltd. | Thrust bearing |
| JP2008542657A (en) * | 2005-06-01 | 2008-11-27 | フェデラル−モーグル コーポレイション | Thrust bearing |
| CN103322022A (en) * | 2012-03-19 | 2013-09-25 | 大同金属工业株式会社 | Half bearing and plain bearing |
| CN107407331A (en) * | 2015-02-27 | 2017-11-28 | 大丰工业株式会社 | Sliding bearing |
| JP2017172607A (en) * | 2016-03-18 | 2017-09-28 | 大豊工業株式会社 | Washer |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018127859A1 (en) | 2019-06-19 |
| JP2019108923A (en) | 2019-07-04 |
| US20190186533A1 (en) | 2019-06-20 |
| US10648503B2 (en) | 2020-05-12 |
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